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dc.contributor.authorLundblad, Carl G.
dc.contributor.authorConway, Courtney J.
dc.date.accessioned2020-03-25T19:39:37Z
dc.date.available2020-03-25T19:39:37Z
dc.date.issued2020-01-27
dc.identifier.citationLundblad, C.G., Conway, C.J. Testing four hypotheses to explain partial migration: balancing reproductive benefits with limits to fasting endurance. Behav Ecol Sociobiol 74, 26 (2020). https://doi.org/10.1007/s00265-019-2796-3en_US
dc.identifier.issn0340-5443
dc.identifier.doi10.1007/s00265-019-2796-3
dc.identifier.urihttp://hdl.handle.net/10150/638069
dc.description.abstractSeasonal migration is ubiquitous in animals, and yet its underlying cause(s) remain poorly known. Species exhibiting short-distance altitudinal migration and intraspecific variation in migratory behavior (partial or differential migration) are ideal study systems for examining the selective pressures that affect individual migratory decisions. We used an individually marked population of yellow-eyed juncos, breeding along a 1000-m elevational gradient and migrating up and down that gradient, to examine the morphological, behavioral, and reproductive traits associated with migratory behavior. We tested the four most well-known hypotheses proposed to explain partial migration: the thermal tolerance, fasting endurance, dominance, and arrival time hypotheses. Our results indicate that: (1) limits to juncos' fasting endurance constrain their ability to overwinter at high elevations, in support of the fasting endurance hypothesis, (2) differences in body size mediate fasting ability and are associated with variation in migratory behavior and overwinter apparent survival, (3) migratory behavior interacts with reproductive success, in partial support of the arrival time hypothesis, and (4) additional mechanisms that are not captured by the four well-known hypotheses might better explain individual variation in migratory behavior. Less migratory females achieved greater nesting success the following breeding season. Among males, nesting success influenced migratory tendency the following winter. Successful males may either migrate to a more benign winter climate without paying reproductive costs, or high levels of parental effort might physiologically constrain their ability to overwinter in harsh climates.en_US
dc.description.sponsorshipNational Science Foundationen_US
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.rightsThis is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.en_US
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/en_US
dc.subjectAltitudinal migrationen_US
dc.subjectArrival time hypothesisen_US
dc.subjectBody size hypothesisen_US
dc.subjectCarry-over effectsen_US
dc.subjectJunco phaeonotusen_US
dc.subjectYellow-eyed juncoen_US
dc.titleTesting four hypotheses to explain partial migration: balancing reproductive benefits with limits to fasting enduranceen_US
dc.typeArticleen_US
dc.identifier.eissn1432-0762
dc.contributor.departmentUniv Arizona, Arizona Cooperat Fish & Wildlife Res Unit, Sch Nat Resources & Environmen_US
dc.identifier.journalBEHAVIORAL ECOLOGY AND SOCIOBIOLOGYen_US
dc.description.notePublic domain articleen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleBehavioral Ecology and Sociobiology
dc.source.volume74
dc.source.issue2
refterms.dateFOA2020-03-25T19:39:38Z


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This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
Except where otherwise noted, this item's license is described as This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.